Nội dung Text: Chapter 11 - Configuring and Testing Your Network

Overview
• Define the role of the Internetwork Operating System
(IOS)
• Use Cisco CLI commands to perform basic router
and switch configuration and verification
• Given a network addressing scheme, select, apply,
and verify appropriate addressing parameters to a
host
• Use common utilities to verify network connectivity
between hosts
• Use common utilities to establish a relative
performance baseline for the network
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AUX
• Another way to establish a CLI session remotely is via a
telephone dialup connection using a modem
connected to the router's AUX port
• Can used locally, like console port
• Console port is also preferred over the auxiliary port for
troubleshooting because it displays router startup,
debugging, and error messages by default.
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Configuration files
• Contain the Cisco IOS software commands used to
customize the functionality of a Cisco device.
• Commands are parsed (translated and executed) by the
Cisco IOS software when the system is booted (from the
startup-config file) or when commands are entered in the
CLI while in configuration mode.
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Types of Configuration Files
• The running configuration file
– Used during the current operation of the device
– Changes to the running configuration will immediately
affect the operation of the Cisco device
• The startup configuration file
– Used as the backup configuration and is loaded when
the device is started
– The startup configuration file or startup-config file is
stored in non-volatile RAM (NVRAM)
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